Chemical Reactions and Energy
Practice Test
1.
The maximum energy reached during a reaction's uncatalyzed pathway is ______________ the maximum energy reached during its catalyzed pathway.
a.
greater than
b.
much less than
c.
equal to
d.
slightly less than
2.
What is the product of an endothermic reaction in which an inorganic phosphate group is added to adenosine diphosphate?
a.
glucose
b.
ATP
c.
lactic acid
d.
ADP
3.
What is the oxidation number of chlorine in KClO
3
?
a.
1-
b.
1+
c.
5+
d.
3+
4.
These lipids include cholesterol, some sex hormones, and vitamin D.
a.
oleic acids
b.
steroids
c.
sucrose polymers
d.
stearic acids
5.
What is the theoretical yield of nitrogen gas if 200 g of sodium azide decomposes?
a.
127 g
b.
200 g
c.
400 g
d.
135 g
6.
When aluminum metals reacts with the tarnish on silver, products of the reaction include ____________.
a.
Ag and Al
3+
b.
Ag
+
and Al
c.
Al and OH
-
d.
Ag and H
+
7.
These are biological compounds that contain a large proportion of C-H bonds and less oxygen than carbohydrates.
a.
sugars
b.
bones
c.
substrates
d.
lipids
8.
How do structural isomers differ from stereoisomers?
a.
Stereoisomers have different chemical and physical properties; structural isomers have the same chemical and physical propeties.
b.
Structural isomers have different formulas; stereoisomers have the same formula.
c.
Structural isomers' atoms are bonded in different orders; stereoisomers' atoms are bonded in the same order.
d.
Structural isomers' atoms are bonded in the same order; stereoisomers' atoms are bonded in different orders.
9.
What is the reducing agent in the reaction Cu(s) + 2AgNO
3
(aq)
2Ag(s) + Cu(NO
3
)
2
(aq)?
a.
Cu
b.
NO
3
1-
c.
Ag(s)
d.
Ag
1+
10.
Which type of can takes the longest to degrade?
a.
aluminum
b.
tin
c.
iron
d.
steel
11.
The typical maximum efficiency of a coal-fired power plant is ______________.
a.
between 50% and 60%
b.
between 60% and 70%
c.
less than 40%
d.
greater than 70%
12.
What is the difference between an aldehyde and a ketone?
a.
Aldehydes have carboxyl groups at the end of a carbon chain; ketones have carboxyl groups within carbon chains.
b.
Aldehydes have carbonyl groups at the end of a carbon chain; ketones have carbonyl groups within carbon chains.
c.
Aldehydes have carbonyl groups; ketones have carboxyl groups.
d.
Aldehydes have carboxyl groups; ketones have carbonyl groups.
13.
What is the name of the alkene with the formula CH
3
CH=CHCH
2
CH
3
?
a.
2-methyl-1-butene
b.
2-pentene
c.
hexene
d.
1-pentene
14.
What type of organic compound is characterized by a hydroxy functional group bonded to a carbon atom of a hydrocarbon?
a.
an aldehyde
b.
an alcohol
c.
carbon dioxide
d.
octane
15.
This device is used to measure the heat given off by chemical reactions.
a.
calorimeter
b.
Erlenmeyer flask
c.
Dumas bulb
d.
colorimeter
16.
This high-energy compound is formed during the light reactions of photosynthesis.
a.
glucose
b.
sucrose
c.
ATP
d.
carbon dioxide
17.
Cells store energy by forming this compound.
a.
acetone
b.
ATP
c.
sucrose
d.
stearic acid
18.
An exothermic reaction is one that _______________.
a.
produces smoke
b.
neither releases nor absorbs heat
c.
absorbs heat
d.
releases heat
19.
Plants appear green because their leaves _____________.
a.
reflect green and yellow light
b.
reflect UV light
c.
absorb green and yellow light
d.
reflect red and blue light
20.
If the theoretical yield of a reaction is 0.2100 g and the actual yield is 0.1880 g, what is the percent yield?
a.
112%
b.
89.50%
c.
51.30%
d.
11.00%
